R0-代数与BL-代数中的素滤子定理

R1-代数与BL-代数在模糊逻辑的研究中有重要作用,这与布尔代数在经典逻辑中的作用类似。本文通过一个特殊集x^-1F分别给出Ro-代数及BL-代数素滤子的一个等价条件,并给出BL-代数的一个新性质。应用这些结果分别得到Ro-代数与BL-代数的素滤子定理。     

预线性剩余格与逻辑代数

本文首先讨论了剩余格与FI代数之间、FI代数与MV代数之间的关系,对已有结果进行了改进。随后提出了预线性剩余格的概念,证明了预线性剩余格是BR_0代数与BL代数的基础,从而也就是著名的MV代数、R_0代数、G代数与Ⅱ代数的公共基础。     

R0-代数(NM-代数)的布尔MP滤子与布尔MP理想

在R0-代数中引入布尔MP滤子与布尔MP理想的概念,给出其若干充要条件,研究了它们与素滤子、极大MP滤子的关系。通过反例指出了关于超MP滤了的一个错误结论,给出超MP滤子的一个充分必要条件。在此基础上研究了R0-代数的结构,用布尔MP滤子与布尔MP理想刻画了二部R0-代数、强二部R0-代数的特征。     

赋值为R0-模糊集的逻辑系统

研究了赋值的R0－模糊集逻辑系统W^－X的语义理认,到了若干结果,特别是对W^-x而言,F（S）的α－重言式类只有1／2－重言式类与重言式类两类。     

R_0代数的可证等价类

讨论了R0代数的滤子以及相应的可证等价类.在R0代数里给出了一些滤子的具体例子,得到:F是R0代数M的超滤当且仅当F是M的固执滤子;当F是R0代数的蕴涵滤子时,M/F是布尔代数;当F是R0代数的极大布尔滤子时,M/F是只有两个元的布尔代数.     

R0-代数上的同余关系

研究了Ro-代数上的同余关系,首先通过探讨一类Ro-代数,建立起滤子与同余关系之间的联系,进而深入到其乘积上,最后以模糊滤子为工具定义R0－代数上的同余关系,讨论了滤子与模糊滤子之间的联系,并给出了由同余诱导的商R0－代数。     

Ω-代数遗传性的注记

探讨了Ω-代数的遗传性,即考察Ω-代数的生成元集的性质对Ω-代数自身性质的影响.证明了在一定条件下Ω-代数的交换性及从一个Ω-代数到另一个Ω-代数的同态映射都由Ω-代数的生成元集决定.     

C~*-代数中元素的τ-期望与τ-方差(英文)

引入了有单位元的C*-代数A的元素A的τ-期望Expτ(A)与τ-方差Varτ(A),它们分别定义为Expτ(A)=τ(A)与Varτ(A)=Expτ((A Expτ(A)1AI)2),建立了关于它们的若干等式与不等式,给出了Expτ(AB)Expτ(A)Expτ(B)与Varτ(A+B)Varτ(A)+Varτ(A)的一些估计.引入并研究了元素A,B的τ-协方差Covτ(A,B),研究了元素的τ-独立性.     

关于微分-代数系统的Runge-Kutta迭代方法的研究

为了求解非自制指标-1的微分-代数系统,我们研究基于Runge-Kutta方法的动力学迭代过程,得到相关的非线性微分-代数方程的收敛理论,这类迭代过程具有一般性和灵活性,且沿着时间域网格点可以选取不同的插值函数.     

非线性指标-3微分-代数系统的波形松弛算法的实现

本文探讨非线性指标-3微分-代数系统的波形松弛算法所涉及的理论模型和具体算例的求解。对于收敛性问题,我们利用谱半径条件证明该理论模型的收敛性,所得结论的收敛性条件相对较弱,并利用算例测试了收敛定理的正确性。结果显示:在求解非线性微分-代数系统时,波形松弛类算法是具有内在并行性的有效算法。     

R0代数的对偶代数

对于R0代数，给出了它的一个等价形式，并建立了它的对偶代数，从此刻划了R0代数内部结构的特征，也为从语义的角度进一步研究模糊逻辑系统提供了一个新的途径。     

塑料对0－3型锆钛酸铅压电复合材料性能的影响

研究了不同塑料尼龙１０１０和Ｅ－２０环氧树脂与锆钛酸铅（ＰＺＴ）复合而成的压电复合材料的压电性能，结果表明，尼龙１０１０－ＰＺＴ压电复合材料比Ｅ－２０环氧树脂－ＰＺＴ具有较低的饱和极化电场和较短的饱和极化时间，而且前者比后者具有更高的压电常数。     

Properties of triglycine sulfate/poly(vinylidene fluoride-trifluoroethylene) 0-3 composites

Composites of triglycine sulfate (TGS) powder dispersed in a poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE), 70/30 mol%) copolymer matrix have been prepared using solvent casting followed by compression moulding. The composites have been characterized by means of scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). Three groups of samples have been prepared: unpoled composites, composites with only the TGS phase poled and composites with both phases poled. The observed relative permittivity of these composites are consistent with the predictions of the Bruggeman model. When the TGS and copolymer phases are poled in the same direction, the piezoelectric activities of the two phases partially cancel each other while the pyroelectric activities reinforce. The pyroelectric coefficients exhibit good agreement with the effective-medium model. These composites have high pyroelectric figures of merit which increase as the volume fraction of TGS increases.     

非对称嵌段共聚物PI-b-PB对IR/BR并用胶相形态与性能的影响

主要研究非对称嵌段共聚物PI-b-PB(液体橡胶LIR-390)对异戊橡胶/顺丁橡胶(IR/BR)共混体系相形态、加工性能和力学性能的影响。采用原子力显微镜(AFM)表征IR/BR并用胶的相形态,结果显示,LIR-390能够细化分散相(BR)的尺寸,且使分散相分布更加均匀;但加入过量LIR-390(7份)则会减弱其增容作用,使BR的相尺寸增大。通过哈克旋转流变仪测试IR/BR未硫化胶的流变特征,发现LIR-390能够降低未硫化胶的储能模量(G′),得出在橡胶共混过程中加入LIR-390可以减少加工能耗。利用裂纹生长测试平台分析并用胶的抗疲劳裂纹生长性能,结果表明,LIR-390的增容作用有助于减小分散相的尺寸,从而降低裂纹生长速率;而加入过量LIR-390则会致使开裂加快。     

非对称嵌段共聚物PI-b-PB对IR/BR并用胶相形态与性能的影响

主要研究非对称嵌段共聚物PI-b-PB(液体橡胶LIR-390)对异戊橡胶/顺丁橡胶(IR/BR)共混体系相形态、加工性能和力学性能的影响.采用原子力显微镜(AFM)表征IR/BR并用胶的相形态,结果显示,LIR-390能够细化分散相(BR)的尺寸,且使分散相分布更加均匀;但加入过量LIR-390(7份)则会减弱其增容作用,使BR的相尺寸增大.通过哈克旋转流变仪测试IR/BR未硫化胶的流变特征,发现LIR-390能够降低未硫化胶的储能模量(G7),得出在橡胶共混过程中加入LIR-390可以减少加工能耗.利用裂纹生长测试平台分析并用胶的抗疲劳裂纹生长性能,结果表明,LIR-390的增容作用有助于减小分散相的尺寸,从而降低裂纹生长速率;而加入过量LIR-390则会致使开裂加快.     

Quantitation of 4-(4-Chl0R0Phenyl)-2-Pyrr0Lidin0Ne in Baclofen Powder and Tablets

Abstract

A high-pressure liquid chromatography method to quantify 4-(4-chlorophenyl)-2-pyrrolidinone which is present as an impurity in baclofen powder and its dosage forms has been developed. The USP-NF method for the determination of 4-(4-chlorophenyl)-2-pyrrolidinone in powder is based on TLC and is only qualitative. The developed method was successfully used to quantify 4-(4-chlorophenyl)-2-pyrrolidinone in powder (USP-NF limit 1%) and in tablets (USP-NF limit 5%). The method is accurate and reproducible with a percent error of 4% for powder and 3% for tablets.     

Nonlinear Optical Properties of a Soluble Form of Polyisothionaphthene

Abstract

The third-order nonlinearity of a low-bandgap conjugated organic polymer has been assessed. Degenerate four-wave mixing experiments (at 1·064 μm using picosecond pulses from a passively mode-locked neodymium-doped yttrium aluminium garnet laser) on solutions of the polymer have permitted the determination of the microscopic third-order nonlinearity γ. The polymer exhibits unusual behaviour which is solution concentration dependent. This behaviour is thought to be due to aggregation effects and strongly suggests that the bulk response of the material is large, the third-order nonlinearity being of the order of ten times greater than that of polythiophene.     

Microstructure and Mechanical Properties of Two-phaseTiAl Alloys in Lamellar Form

In two-phase TiAl alloys, the lamellar structures are of special interest and importance since they are so common and persistent. not only under as-cast conditions but also after thermal treatment. However. the lamellar structures are still poor in ductility,although they are beneficial for toughness and high temperature strength. This article will review the recent progress made in understanding the basic mechanical properties of the γ and α2 phases which comprise the two-phase alloys in Iamellar form, and discuss how an improved balance of strength and ductillty in the lamellar form may be achieved     

Analytical Study of Nifedipine and Its Photo - Oxidized Form

Nifedipine, a calcium channel blocking dihydrophridine derivative, undergoes ready photochemical conversion to the corresponding pyridine derivative when exposed to normal laboratory and UV light. the Photo-Oxidation of the drug leads to remarkable diminution of pharmacological activity.

The study describes a direct and simple spectrophotometric method for the simultaneous determination of both nifedipine and its oxidized degradation product. The molar absorptivities of both components at 237, 280 and 360 nm were also calculated. The method is based on the measurement of absorbance values at two wavelengths and the calculation of the concentrations of the two components in the mixture by solving for two simultaneous equations.